Today was the first time I have tried to use my new compressor and air brush. The compressor came from Harbor Freight and is putting out about 30 psi according to the guage. Not sure who made one of the air brushes I have but it would spray water fairly good. Started mixing acrlic paint with water (says you can thin with this) got it way thin and it still would not spray the paint. I switched to the cheap air brush from HF and with this thined paint I could get a coat of paint. My question is what should I try to do to get the first airbrush to work and does anyone know how to adjust output on HF compressor?